1. The probability that a cellular phone company kiosk sells X number of new phone contracts per day is shown below. Find the mean for this probability distribution. Round it to the nearest tenths. X 4 5 6 8 10 P(X) 0.4 0.3 0.1 0.15 0.05 2. The probability that a cellular phone company kiosk sells X number of new phone contracts per day is shown below. Find the variance for this probability distribution. Round it to the nearest hundredths. X 4 5 6 8 10 P(X) 0.4 0.3 0.1 0.15 0.05 3. The probability that a cellular phone company kiosk sells X number of new phone contracts per day is shown below. Find the standard deviation for this probability distribution. Round the answer to the nearest hundredths. X 4 5 6 8 10 P(X) 0.4 0.3 0.1 0.15 0.05 4. A landscape contractor bids on jobs where he can make $3000 profit. The probability of getting 1, 2, 3, or 4 jobs per month are shown below. Find the contractor's profit per month. Number of jobs 1 2 3 4 Probability 0.2 0.3 0.4 0.1 5. If the variance of a random variable is 4, what is the standard deviation? 6. For a game at the carnival you get to roll a ten-sided die, numbered from 1 to 10. If you roll at least a 3, you win$10. Unfortunately, if you roll anything else, you lose $15. How much money do you expect to make (or lose) per game?